L89 intake gasket question
Thread Starter
Melting Slicks
Joined: Feb 2005
Posts: 2,145
Likes: 115
L89 intake gasket question
Did 68 L 89 use block off plate gaskets in the heat passages.
2nd question. If they didn't use them, is it better to use the block of plates.
So which is the better configuration. Any info and GM part numbers appreciated. Thanks
2nd question. If they didn't use them, is it better to use the block of plates.
So which is the better configuration. Any info and GM part numbers appreciated. Thanks
Melting Slicks
Joined: May 2007
Posts: 2,415
Likes: 154
you can not use the heat riser cross over plates if you want to have a operating choke. only the L88 had a inoperable choke. you will make more power with the cross over blocked to keep the heat from the intake manifold.
Safety Car
Joined: Sep 2005
Posts: 4,226
Likes: 643
From: Orange County Ca
[QUOTE=PAmotorman;1591661226]you can not use the heat riser cross over plates if you want to have a operating choke.
I read the hype a few years ago and blocked off my manifold. Big mistake! The car took for ever to warm up and run right, even in SoCal. I changed it back about a month later.
I read the hype a few years ago and blocked off my manifold. Big mistake! The car took for ever to warm up and run right, even in SoCal. I changed it back about a month later.
Melting Slicks
Joined: May 2007
Posts: 2,415
Likes: 154
[QUOTE=Sayfoo;1591661277]I ran all my aluminum intake hi per engines with the cross over blocked and I live here in Pa. cast iron intake is a different matter as it will not heat up
Thread Starter
Melting Slicks
Joined: Feb 2005
Posts: 2,145
Likes: 115
So,
So, aluminum heads and aluminum intake and operable choke needs to have open cross over.
I have take engines apart with them in there and I seem to recall the choke as operable.
Question again.... Some gasket kits seem to not completely block off the passages, they use a stainless restrictor plate that has a small opening in it. Is this considered blocked off??
[QUOTE=PAmotorman;1591661389]
I have take engines apart with them in there and I seem to recall the choke as operable.
Question again.... Some gasket kits seem to not completely block off the passages, they use a stainless restrictor plate that has a small opening in it. Is this considered blocked off??
[QUOTE=PAmotorman;1591661389]
Thread Starter
Melting Slicks
Joined: Feb 2005
Posts: 2,145
Likes: 115
I'm just trying to get this right without taking this engine back apart. I seem to recall tri powers wanting to boil the gas out of the carburetors. Granted, this could have many causes. My engine will essentially be stock.
So question again: Are there three options; no block off plate; block-off plate with a hole in it and a complete block off plate with no hole in it? Makes me wonder. I appreciate the comments from the board. Thanks everyone!
So question again: Are there three options; no block off plate; block-off plate with a hole in it and a complete block off plate with no hole in it? Makes me wonder. I appreciate the comments from the board. Thanks everyone!
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Melting Slicks
Joined: May 2007
Posts: 2,415
Likes: 154
I'm just trying to get this right without taking this engine back apart. I seem to recall tri powers wanting to boil the gas out of the carburetors. Granted, this could have many causes. My engine will essentially be stock.
So question again: Are there three options; no block off plate; block-off plate with a hole in it and a complete block off plate with no hole in it? Makes me wonder. I appreciate the comments from the board. Thanks everyone!
So question again: Are there three options; no block off plate; block-off plate with a hole in it and a complete block off plate with no hole in it? Makes me wonder. I appreciate the comments from the board. Thanks everyone!